CN201810439U - Isopiestic pressure oil injection pump - Google Patents
Isopiestic pressure oil injection pump Download PDFInfo
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- CN201810439U CN201810439U CN201020575075XU CN201020575075U CN201810439U CN 201810439 U CN201810439 U CN 201810439U CN 201020575075X U CN201020575075X U CN 201020575075XU CN 201020575075 U CN201020575075 U CN 201020575075U CN 201810439 U CN201810439 U CN 201810439U
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Abstract
The utility model relates to an isopiestic pressure oil injection pump which is a mechanical oil injection pump. The oil injection pump comprises an oil injection pump body with a flange, an oil outlet adapter, an isopiestic pressure oil outlet valve assembly, a plunger coupler, a rack regulating mechanism and drive components, wherein the isopiestic pressure oil outlet valve is in a valve-in-valve structure and is a conical surface seal type oil outlet valve; the pressure relief valve is in a steel ball seal structure; and the oil outlet valve also performs the function of a pressure relief valve seat. The high-pressure seal adopts a rigid pressure plate type, so that the stress is uniform, thereby ensuring high-pressure seal performance, maximally reducing the deformation of oil pumping elements, especially the deformation of plunger bushing mesopores, and further ensuring the operational reliability of the oil injection pump plunger at high rotating speed. The rated speed of the diesel engine using the isopiestic pressure oil injection pump is 1500r/min, the single-cylinder rated power is 90-110kW, the cylinder diameter is phi 190mm and the stroke is 210mm.
Description
Technical field
The utility model belongs to the diesel engine field, and being specifically related to a kind of rotating speed that is used for is 1500r/min, and single cylinder rated power is 90kW～110kW, and cylinder diameter is the isobaric Injection Pump of the reinforcement diesel engine of φ 190mm.
Background technique
The reliability of diesel engine work depends on the reliability of Injection Pump work to a great extent.The traditional combustible substance of diesel engine is a diesel oil, and combustible substance is single, in recent years, can burning diesel oil, can become development of diesel trend by combusting heavy oil again, this structural behaviour to diesel injection pump has proposed higher requirement.For rated speed 1500r/min, single cylinder rated power is 90kW～110Kw, cylinder diameter is φ 190mm, stroke is the reinforcement diesel engine of 300mm, existing diesel injection pump, the constant pressure delivery valve assembly is divided into seat up and down, reduction valve and outlet valve are the steel ball type structure, have the problem that sealing is relatively poor, stability is bad; Plunger coupled parts does not have pressure lubrication mechanism, and all can not preferably satisfy its requirement at aspects such as stability and working lifes working life, has many places that require further improvement.
Summary of the invention
The purpose of this utility model just is at the prior art above shortcomings, a kind of isobaric Injection Pump that improves structure is proposed, to be applicable to that rotating speed is 1500 r/min, single cylinder rated power is 90kW～110kW, and cylinder diameter is the oil spout needs of the reinforcement diesel engine of φ 190mm.
The technical solution of the utility model is as follows:
This isobaric Injection Pump comprises: include flanged (FLGD) fuel injection pump housing, delivery connection, constant pressure delivery valve assembly, plunger coupled parts, tooth bar controlling mechanism and transmission part etc.
Described constant pressure delivery valve assembly is a valve arrangement in the valve, and it is made up of outlet valve, delivery valve seat, pressure regulation pad, pressure-relief valve spring, pressure-relief valve spring seat and steel ball; Described outlet valve is installed in the delivery valve seat, and outlet valve is a conical surface seal formula outlet valve; Reduction valve is a steel ball sealing formula structure, and its pressure-relief valve spring, pressure-relief valve spring seat and reduction valve steel ball all are assemblied in the outlet valve, as Pressure relief valve seat, and in the outlet valve top design throttle orifice is arranged with outlet valve, and sidewall design has spill port.
The diameter of described outlet valve is φ 12～φ 16mm, and the diameter of reduction valve steel ball is φ 3.5mm, and the reduction valve cracking pressure is 9.8MPa～10.2MPa, and the throttle orifice diameter is φ 1.0～φ 1.2mm.
In this structure, outlet valve act as the supercharging oil road, and play the partition effect of high-pressure oil duct and low pressure oil duct; Reduction valve act as pressure release oil duct and decompression, also play high pressure and the effect of low pressure oil duct partition.The advantage of valve arrangement constant pressure delivery valve is a compact structure in this valve, the outlet valve conical surface and reduction valve seat surface are on same gyration center, good manufacturability, can guarantee how much Geometrical Tolerance Principle well, and outlet valve and reduction valve have stability and long life-span and reliability preferably in the high-speed motion process.
Described constant pressure delivery valve assembly top is equipped with delivery connection, with being connected between the plunger coupled parts is to adopt high-strength bolt and compress delivery connection by pressing plate, thereby compress constant pressure delivery valve assembly and plunger coupled parts, the rigid plane high pressure seal structure of formation.This rigidity pressing plate pattern high pressure seal structure is by the high-strength bolt clamping platen, thereby compressing delivery connection, constant pressure delivery valve assembly and plunger coupled parts sealing surface guarantees high pressure sealing and realizes the fastening of part, it is stressed evenly, guaranteed high-pressure tightness, can reduce the distortion of pump element to greatest extent, especially the distortion of plunger bushing mesopore, thus the reliability that injection pump plunger is worked guaranteed under high rotary speed movement.
In this isobaric Injection Pump, design has the pressure lubrication oil duct in plunger coupled parts, and design has lubricated annular groove of two circles and the lubricating screw groove that is connected lubricated annular groove up and down on the work cylindrical of plunger, and plunger coupled parts is carried out pressure lubrication; Design has the return flow oil road on plunger bushing, and fuel oil is forced oil return.This forced lubrication structure is applicable to all kinds of Diesel oils and low viscosity heavy oil, this moment, plunger surface was without enhancement process, also be applicable to GB/T17411 RMG35 residue fuel oil peculiar to vessel and crude oil, this moment, plunger surface adopted the corrosion resistant stratification processing that is coated with by force, comprised the processing of coating TiC, TiN and other composite coatings.
Plunger diameter is Φ 16mm, and ram lift is 15mm, satisfies the requirement of diesel engine speed power per cylinder 90kW～110kW when 750r/min.
The profile top of fuel injection pump housing is square, and the bottom is circular, and Injection Pump is the monoblock pump of band roller, has the residual pressure of suitable uniformity, can guarantee the conformity of each oil supply cylinder rule, avoids secondary injection and intrasystem cavitation pitting.
Advantage of the present utility model is as follows:
1, the constant pressure delivery valve assembly is a valve arrangement in the valve, and outlet valve is a conical surface seal formula outlet valve, and reduction valve is the steel ball type reduction valve, compact structure; The outlet valve conical surface and reduction valve seat surface are on same gyration center, and good manufacturability can guarantee Geometrical Tolerance Principle well how much; The constant pressure delivery valve assembly of valve arrangement in this valve, outlet valve and reduction valve have stability and long life-span and reliability preferably in the high-speed motion process.
2, the design of plunger work cylindrical has lubricated annular groove and lubricating screw groove, and mating plate carries out pressure lubrication, has increased the bite-resistant ability of plunger coupled parts; Plunger bushing design return flow oil mechanism prevents that effectively fuel oil from flowing to Injection Pump bottom dilution lubricating oil.
3, this equipressure injection pump plunger diameter is Φ 16mm, ram lift is 15mm, has forced lubrication structure, when plunger surface not being done the reinforcement processing, be applicable to all kinds of Diesel oils, low viscosity heavy oil, and corrosion resistantly be coated with stratification by force and handle when plunger surface is adopted, comprise that coating TiC, TiN and other composite coatings are handled after, applicable to GB/T17411 RMG35 residue fuel oil peculiar to vessel and crude oil.
4, this equipressure Injection Pump in the whole pump housing of Injection Pump, can directly be encased in the driving mechanism design in the diesel engine cam case, and compact structure is easy for installation.
Description of drawings
Fig. 1 is this equipressure Injection Pump section of structure.
Fig. 2 is the section of structure of constant pressure delivery valve employed in figure 1.
Fig. 3 is the section of structure of the plunger coupled parts that Fig. 1 adopted.
Fig. 4 is the outline drawing of this equipressure Injection Pump.
Embodiment
Below in conjunction with description of drawings structure of the present utility model.
Referring to Fig. 1, this equipressure Injection Pump is made up of delivery connection 1, clamping bolt 2, pressing plate 3, fuel injection pump housing 6, constant pressure delivery valve assembly 7, plunger coupled parts 9, tooth bar 10, gear ring 11, upper spring dish 12, piston spring 13, lump 14, lower spring cup 15 and guide piston assembly 16 and other parts.Injection Pump is installed on the diesel engine cam case, and the rotation of camshaft promotes the transmission part to-and-fro motion, thereby drives 16 to-and-fro motion of guide piston assembly, and the to-and-fro motion of guide piston assembly 16 drives injection pump plunger and moves up and down, thereby reaches the purpose of fuel feeding; In the fuel feeding process, low-voltage fuel can be got back to low-pressure cavity by plunger bushing fuel leakage oil back oil road during by the clearance leakage between plunger and plunger bushing.
Fig. 2 is a constant pressure delivery valve section of structure employed in figure 1.
These extrude oil valve assembly is valve arrangement in the valve, is an outlet valve, is again a reduction valve.The constant pressure delivery valve assembly is made up of outlet valve 71, delivery valve seat 72, pressure regulation pad 73, pressure-relief valve spring 74, pressure-relief valve spring seat 75 and reduction valve steel ball 77.Outlet valve 71 is installed in the delivery valve seat 72, and outlet valve 71 is a conical surface seal formula outlet valve; Reduction valve is a steel ball sealing formula structure, and its pressure-relief valve spring 74, pressure-relief valve spring seat 75 and steel ball 77 all are assemblied in the outlet valve 71, as Pressure relief valve seat, and in outlet valve 71 top design throttle orifice 78 is arranged with outlet valve 71, and sidewall design has spill port 76.The diameter of outlet valve 71 is φ 12～φ 16mm, and the diameter of reduction valve steel ball 77 is φ 3.5mm, and the reduction valve cracking pressure is 9.8MPa～10.2MPa, and throttle orifice 78 diameters are φ 1.0～φ 1.2mm.
In the plunger delivery stroke, oil pressure among Fig. 1 in the pump chamber 8 raises, this pressure is born by conical surface seal outlet valve 71, when this pressure during greater than outlet valve 71 cracking pressures, outlet valve 71 overcomes the spring force of oil outlet valve spring and lifts, high pressure oil among Fig. 1 in the pump chamber 8 is pressed in the high-pressure oil pipe by Fig. 1 mesohigh oil duct 4, thereby finish the supply of high pressure oil, after fuel feeding finishes, pump chamber 8 becomes low-pressure cavity, high pressure oil in the high-pressure oil pipe oppositely flows into low-pressure cavity through Fig. 1 mesohigh oil duct 4, and after high pressure oil was lower than a certain setting numerical value, outlet valve cut out.When if the oil pressure among Fig. 1 in the pump chamber 8 is higher than the reduction valve cracking pressure owing to the pressure wave transmission with the stack sum, then reduction valve steel ball 77 overcomes the impacting force of pressure-relief valve spring 8 and lifts, high pressure oil enters low-pressure cavity through throttle orifice 78 and spill port 76, oil pressure in the high-pressure oil duct obtains pressure release, each cylinder oil pressure balance.
Fig. 3 is the plunger coupled parts section of structure that Fig. 1 adopted.
The plunger 93 work cylindricals of this plunger coupled parts design the lubricated annular groove 91 of two circles up and down, middle by 92 connections of lubricating screw groove.In the fuel feeding process, there is fuel oil to enter lubricated annular groove 91 and lubricating screw groove 92 by even part gap, mating plate carries out pressure lubrication.It is that fuel oil is forced oil return that plunger bushing 95 designs have return flow oil hole 93, its effect.In the fuel feeding process, when having low pressure oil to ooze out in the plunger coupled parts gap, can be by back oil road 94 forced refluences to low-pressure cavity.
Fig. 4 is the profile of isobaric Injection Pump shown in Figure 1.
The fuel injection pump housing 6 profile tops of this equipressure Injection Pump be square, bottom for circular, the design of tooth bar tail end has maximum oil mass restricting means, has avoided the Runaway of Diesel Engine fault that causes because of oil mass is excessive, has guaranteed the reliability of diesel engine.
Rigidity pressing plate pattern is adopted in high pressure sealing, constant pressure delivery valve assembly top assembling delivery connection 1, with being connected between the plunger coupled parts is to adopt high-strength bolt 2 and compress delivery connection 1 by pressing plate 3, thereby compress constant pressure delivery valve assembly and plunger coupled parts, the rigid plane high pressure seal structure that forms, make stressed even, guaranteed high-pressure tightness, realize the fastening of part, reduce the distortion of pump element to greatest extent, especially the distortion of plunger bushing mesopore, thus the reliability that injection pump plunger is worked guaranteed under high rotary speed movement.
Claims (4)
1. isobaric Injection Pump, it is the mechanical type Injection Pump, includes flanged (FLGD) fuel injection pump housing, delivery connection, constant pressure delivery valve assembly, plunger coupled parts, tooth bar controlling mechanism and transmission part;
It is characterized in that: described constant pressure delivery valve assembly is a valve arrangement in the valve, and it is made up of outlet valve (71), delivery valve seat (72), pressure regulation pad (73), pressure-relief valve spring (74), pressure-relief valve spring seat (75) and reduction valve steel ball (77); Described outlet valve (71) is installed in the delivery valve seat (72), and outlet valve (71) is a conical surface seal formula outlet valve; Reduction valve is a steel ball sealing formula structure, its pressure-relief valve spring (74), pressure-relief valve spring seat (75) and steel ball (77) all are assemblied in the outlet valve (71), with outlet valve (71) as Pressure relief valve seat, and throttle orifice (78) being arranged in outlet valve (71) top design, sidewall design has spill port (76);
The diameter of described outlet valve (71) is φ 12～φ 16mm, and the diameter of reduction valve steel ball (77) is φ 3.5mm, and the reduction valve cracking pressure is 9.8MPa～10.2MPa, and throttle orifice (78) diameter is φ 1.0～φ 1.2mm;
Described constant pressure delivery valve assembly (7) top is equipped with delivery connection (1), with being connected between the plunger coupled parts (9) is to adopt high-strength bolt (2) and compress delivery connection (1) by pressing plate (2), thereby compress constant pressure delivery valve assembly (7) and plunger coupled parts (9), the rigid plane high pressure seal structure of formation.
2. isobaric Injection Pump according to claim 1, it is characterized in that: described plunger coupled parts has the pressure lubrication oil duct in (9), design has lubricated annular groove (91) of two circles and the lubricating screw groove (92) that is connected lubricated annular groove (91) up and down on the work cylindrical of plunger (93), and plunger coupled parts is carried out pressure lubrication; Going up design at plunger bushing (5) has return flow oil road (94), and fuel oil is forced oil return.
3. isobaric Injection Pump according to claim 1 is characterized in that: the diameter of described plunger (93) is Φ 16mm, and the lift of plunger (93) is 15mm.
4. isobaric Injection Pump according to claim 1 is characterized in that: the profile top of described fuel injection pump housing (6) is square, and the bottom is circular, and Injection Pump is the monoblock pump of band roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020575075XU CN201810439U (en) | 2010-10-25 | 2010-10-25 | Isopiestic pressure oil injection pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020575075XU CN201810439U (en) | 2010-10-25 | 2010-10-25 | Isopiestic pressure oil injection pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201810439U true CN201810439U (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020575075XU Expired - Lifetime CN201810439U (en) | 2010-10-25 | 2010-10-25 | Isopiestic pressure oil injection pump |
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| CN (1) | CN201810439U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374087A (en) * | 2011-10-20 | 2012-03-14 | 重庆红江机械有限责任公司 | High-pressure high-injection-rate single oil injection pump |
| CN104204502A (en) * | 2012-03-16 | 2014-12-10 | 三菱重工业株式会社 | Fuel injection pump |
| CN106121887A (en) * | 2016-08-24 | 2016-11-16 | 重庆红江机械有限责任公司 | A kind of fuel injector integrating electronically controlled unit pump |
| CN106121889A (en) * | 2016-08-30 | 2016-11-16 | 重庆红江机械有限责任公司 | High Enhanced diesel engine constant-pressure oil injection pump |
| CN107575325A (en) * | 2017-10-20 | 2018-01-12 | 江苏常发农业装备股份有限公司 | A kind of equal pressure mechanical oil pump |
-
2010
- 2010-10-25 CN CN201020575075XU patent/CN201810439U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102374087A (en) * | 2011-10-20 | 2012-03-14 | 重庆红江机械有限责任公司 | High-pressure high-injection-rate single oil injection pump |
| CN104204502A (en) * | 2012-03-16 | 2014-12-10 | 三菱重工业株式会社 | Fuel injection pump |
| CN106121887A (en) * | 2016-08-24 | 2016-11-16 | 重庆红江机械有限责任公司 | A kind of fuel injector integrating electronically controlled unit pump |
| CN106121887B (en) * | 2016-08-24 | 2019-09-13 | 重庆红江机械有限责任公司 | A kind of fuel injector integrating electronically controlled unit pump |
| CN106121889A (en) * | 2016-08-30 | 2016-11-16 | 重庆红江机械有限责任公司 | High Enhanced diesel engine constant-pressure oil injection pump |
| CN107575325A (en) * | 2017-10-20 | 2018-01-12 | 江苏常发农业装备股份有限公司 | A kind of equal pressure mechanical oil pump |
| CN107575325B (en) * | 2017-10-20 | 2024-02-27 | 江苏常发农业装备股份有限公司 | Isobaric mechanical oil pump |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110427 |
|
| CX01 | Expiry of patent term |